Ring and roller and like mill.



IPATENTED FEB. 12, 1907.

B. BARTHELMESS.

RING AND ROLLER AND LIKE MILL.

APPLICATION FILED MABJI 1903.

j 2 BKBETBBHBBT 1.

No. 844,085. PATBNTED FEB. 12, 1907.

B. BARTHBLMESS.

RING AND ROLLER AND LIKE MILL.

APPLIOATIDN FILED MAE.2,1908.

2 SHEETB BHBET 2.

%ZZZJJJ6J I dim. s24- EMID BARTHELMESS,

PATENT OFFICE.

OF NEUSS, GERMANY.

RING AND ROLLER AND LIKE MILL.

Specification of Letters Patent.

Yatented Feb. 12, 1907.

Application filatl March 2. 1903- I Qerial No. 145,747.

To all whom it may concern:

Be it known that I, EMIL BARTHELMEs's, a subject of the German Emperor, residing at N euss-on-the-Rhine, Germany, have invent- .ed certain new and useful Improvements in Ring and Roller and Like Mills, of which the following is a specification.

My invention relates to ring and roller mills having the rollers or grinding-bodies mounted on pendulu ms and serving for grinding hard and soft materialssuch as ores, coal, colors, &c.to a very fine flour or for granulating the same to a definite size of grain by wet or dry grinding, the new features and improvements employed in these mills and forming the object of my said invention being set forth in the following description and in the accompanying drawings, in which- Figure 1 is a vertical section of a pendulum-mill constructed according to my invention. Fig. 2 is a horizontal section on the line 2 2 of Fig. 1, interior arts being removed; and Fig. 3 is a simi ar view on the line 3 3 of Fig. 1.

My improved pendulum-mill comprises three principal partsnamely, the stationary grinding vessel or vat A, the main beltulley B, and the inlet or feed apparatus C. These features differ from the constructional forms of known pendulum-mills in that they enable new technical effects to be obtained, while obviating known disadvantages, this being so whether they are ap lied separately or together to a pendulum-mi l.

The grinding-vat A bears all the fixed parts of the mill-namely, the grinding-ring 1, the bottom formed by ratcs 2, the fine sieve 3, the sheetmetal casing 4, the collect ing-hopper 5, the annular cover 6, the inlethop er 7 and the shaft 8, which latter is re erably of steel and is rigidly mounted in a ollow column 9, of cast metal. The column 9 is provided in its upper part with elongated openings 10, through which a separating medium enters the rinding-vat to promote the carrying out of t 1e ristthat is to say, the ound materialt e separatin medium, or exam le, being air, and which flowing downwar ly separates the finely-ground material from that not sufficiently ground. The air is drawn in throu h openin s in the cover of the grinding-vat, t rough which the shafts of the grinding bodies or rollers extend. A portion of the air passes ownwardly, while the remaining portion passes out through the sieve 3. Tihat portion of the air which asses downward y through the vat is then rawn up through the element 9, as a natural suetion is created owing to the o eration of the grinding bodies or rollers, an from the element 9 the air is drawn in the vat through the openings 10. These openings are narrow, so that the air as it enters the grindingvat is separated into jets and blows upward the finely-ground material. The grist is retained in the collecting-hopper 5 by its own weight and the arrangement of the sheetmetal baflics or deflectors 11 and 12.

The tube 13 serves for sucking off the dusty air. Its suction-opening is arranged at a point where the amount of dust in the air is the least.

In order to prevent the grist thrown through the fine sieve 3 from 'alling in the conduit 18, a protecting-wall 14 is provided.

16 is the eccentric driving-gear, and 17 17 are suspension-springs for a flat sieve 15.

The collecting-hopper 5 serves for catching the finished rain, while the insufficientlyground material passes through conduit 18 in order to be returned to the mill.

The bottom 2 is composed of separate interchangeable grate members which can readily be removed to empty the mill at periodic intervals, if desired.

The main belt pulley B, Fig. 1, turns loosely on the shaft 8 and rests on the hollow column 9, of cast metal, by means of a ballbearing 19, which is rendered dustproof by means of felt packing 20. Said pulley serves as a carrier for any desired number of grindin bodies or rollers 21 suspended like pendu lums, which can be swung out by means of shafts 22 and endulum-sleeves 23 about the pins 24. 25 indicates hubs with vanes or webs. 26, 27, and 28 are packingieces of felt, leather, or cloth, by means 0 which a complete closure against dust, water, 630., is attained. The interior of the pulley B is likewise packed against dust from the top by a sheet-metal cover 29 and felt packing 30. When it is desired to rovide separate driv ing-gear for the endu ums themselves in order to increase t e grinding power, the inte rior of the pulley B serves for receiving the gear-wheels 31 and the driving gearwheel 32. The gear-wheel 3l-that is to say, the pitch-circles of the teeth thereof-are contracted to an are described about the point 24 of suspension, whereby a uniformly deep engagement of the teeth is insured for each position of the pendulums. The central gear-wheel 32 is either rigidly connected with the shaft 8 by means of a set-screw 33 or is set in rotation by means of clutch: jaws 35 from a second belt-pulle 34. If it be desired that the mill shall grin the grist into grains, the mechanism 31, 32, 33, 34, and 35 can be dispensed with. Also a set-screw 36 serving as a stop, can be arranged on the belt-pulley B, against which set-screw the pendulumsleeve 23 rests, so that the grinding-roller 21 is kept at a minimum distance from the grindmg-ring 1, corresponding to the desired size of the grains.

As an inlet arrangement 0 any known construction serving for the su ply of the material can be employed. Bel w the inlet-tube 2o 37 is a shaking-shoe 38, which is operated by stops 39, an eccentric 40, a shaft 41, a ratchet-wheel 42, and a cam 43. The cam 43 is ri idly connected with the sleeves 23 of the pendulum. If too much material is supplied to the mill, so that the rollers 21 are forced away from the grinding-ring 1 or the distance regulated by the set-screws is increased, the cam 43, following the movements of the pendulum, comes out of gear. The shoe 38 stops then till the mill has worked the surplus of material.

What I claim is i 1. In a pendulum-mill for wet or dry grinding to flour or rains, a main driving-pulley, a pendulummofi suspended therefrom, gearwheels arran ed'in operative relation with res ect to said ulley and said pendulum and inc osed in said pulley in a dust-tight manner, a rinding-vat in which operates the said pendu um, a hollow column arranged centrallv in said vat and pro gided with openin s for t e entrance of air or water, a mam sha t carrying the pulley and secured in said holprovided with openi low column, and a hopper arranged below the column, a

2. In a pendulum-mill, ior wet or dry grinding to flour or grains, a grinding-vat, a hollow column arranged centrally therein and s for the entrance of air'or water, a main s aft fixedly secured in said hollow column, a hopper arranged below the column and a deflector located Within the hopper and at a distance from the lower end of saidhollow column.

3. In a pendulum-mill, for wet or dry grindlu to flour or grains, a grinding-vat, a hollow co umn arranged centrally therein and rovided with openings for the entrance 0 air or water, a main shaft fixedly secured in said hollow column, a hopper arranged below the column, a deflector located within the hopper and at a distance from the lower end of said hollow shaft, and a suction-pipe having its mouthinterposed between the deflector and the end of said shaft.

4. In a pendulum-mill forrwet or dry grinding to flour or grains, a grinding-vat, a hollow column arranged centrally therein and provided with openings for permitting the entrance of air or water, a deflector located below and at a distance from the lower end of said column, a hollow frusto-conical deflector surrounding said first-named deflector at a distance therefrom, a ho er surrounding said latter deflector, a sha ing-screen interposed between said hopper and said deflectors, and adischar epipe extending through said hopper and adapted to receive material passing off of said screen.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

EMIL BARTHELMESS. Witnesses:

WILLIAM ESSENWEIN, PETER LIEBER. 

